Shimizu-led JV Awarded Contract for Jakarta MRT North-South Line Phase 2 “CP202” Underground Work

A joint venture formed by Shimizu Corporation (President: Kazuyuki Inoue, “Shimizu”) and PT Adhi Karya (Persero) Tbk, an Indonesian state-owned company has been awarded Contract Package 202 for the Jakarta MRT North-South Line Phase 2 (employer：PT. MRT Jakarta), a 1,840m-long underground section including three stations.

The Jakarta MRT is Indonesia's first urban high-speed railway including a subway system, and the 15.7km-long first phase of the project between Central Jakarta and South Jakarta started its operation in March 2019. The civil and building work for the Phase 1 was comprised of six design and build contract packages and Shimizu was responsible for the three packages, two as a JV lead company and one as a JV member.

Phase 2 of the project will construct a 6.0km subway line extending from the “Bundaran H.I. Station” at the northern end of the already-operational section up to the Kota district in northern Jakarta, wherein the seven new stations will be built. The construction work is divided into three contract packages, of which the CP201 (length: 2,676m) from Bundaran HI Station to Harmoni Station was awarded to Shimizu-Adhi Karya JV in March 2020 as the first construction contract of the three packages.

The newly awarded CP202 is a 1,840m underground construction section from Harmoni Station to Mangga Besar Station, including construction of Harmoni Station with a length of 235m consisting of two levels, Sawah Besar Station with 200m-long and four levels, and Mangga Besar Station with 220m-long and four levels. The tunneling work consists of four shield tunnels connecting the stations (two sections for inbound and outbound respectively, with each bound's total tunnel length of 1,184m; a finished inner diameter of 6.05m), with a length of 394m between Harmoni-Sawah Besar and a length of 790m between Sawah Besar- Mangga Besar. The construction period is approximately 89 months starting from July 2022. The Phase 2 is scheduled to start its operation in 2029.

In this contract package, large-scale underground stations will be constructed by cut and cover method under a trunk road with extremely heavy traffic. Construction work will be carried out while diverting the traffic lanes various times, and it will also be necessary to partially cover the canal that runs through the center of the trunk road. In addition, there are many buildings and underground pipes in proximity, making this a highly challenging urban civil engineering project requiring a construction plan with careful consideration of the impact on the surrounding areas.

In Indonesia, the country's rapid economic growth has made the expansion of transportation infrastructure and environmental considerations a key issue for future development, and there is a need to improve the public transportation. We will continue to contribute to infrastructure development in Indonesia, focusing on large-scale construction projects where we can make the most of our technical capabilities.